Process of treating rubber articles and product thereof.



'RAYMOND 3. PRICE, OF MISH AWAKA, INDIANA, ASSIGNOR; TO

r COMPANY, A CORPORATION OF INDIEAHA.

PROCESS OF TREATING RUBBER ARTICLES AND PRODUCT 1$ Patented May 23, 1916.

No Drawing.

; To all whom-it may concern:

-Be it known that I, RAYMonn B. PRICE, a

citizen of the United States, residing at Mish awaka, in the county of of Indiana, have invented new and. useful Improvements in 'P'rocesses of Treating Rubber which the following is a specification.

'Fully nine-tenths of" the rubber articles now being manufactured embody in their structure more, or'less fabric or fiber, and the object of the present invention is to produce a more intimate union between said fabric ,or fiber and the rubber. This object I accomplish primarilyby treating, the fabric or fiber with a'substance'having a greater adhesive affinity for rubber than has fabric or fiber, which will act inmuch the same'manner as does the usual flux employed in uniting metals.

'- One method of carrying out my process is to coat the'fabric or fiber mechanically with a substance having an aflinity for rubber, such as finely divided copper, though any other suitable metal may be employed.-

I also. contemplate employing a solution of sulfate or chlorid of copper or other metal .quick lime,

suitable for the purpose, and I- may also employ a method or methods of precipitat ing the metal or salt employed upon or in the fabric or fiber. In fact, my invention contemplates in its broadest aspect the application of. a substance, either before or during vulcanization, to a fabric or fiber to e used in conjunction with rubber compound to cause a more intimate union between the rubber either prior to orduring vulcanization. And my invention also contemplates the employment of such a substance in connection with reclaimed rubber, either alone or compounded, when employed with fabric. or

While in most instances, especially where metal is employed as the uniting agent, the action upon the rubber during vulcanization still Id'o not limit action, but contemplate the employment whether acting chemically or cause a more intimate union rubber and the fabric of fiber. template employing such'substances as are highly hygroscopic in character, such as which when employed in a pownot, which will between the 'Speciflcationof Letters Patent. Applicatibn filed {une 23,

' dered state will absorb St. Joseph, State Articles and Product Thereof, of

and the fabric or fiber of any substance,

Thus, I con- 1911. Serial N0.834,870.

practically all of the moisture on or in the fabric or er. H

-The desired intimate union between the fabric and rubber which is attained as above described, is in quicker and therefore a harder cure of that portion of therubber which comes in contact with the substance with which'the fabric is associated than would otherwise be the case. It is desirable to have as little of the rubber thus over treated as is possible without defeating the ends sought Therefore, the fabric or fiber is treated instead ofthe rubber itself. By treating the fabric it is only that portion of the rubber which comes in contact with the fabric, that is thus cured; while if the ,treatment to the rubber instead of the fabric, the vulcanization which necessarily follows would result in a harmful over-curing of portions of the rubber not needed for attaining the desired intimate union.

There are many substances which may be used to obtain the result desired, some of which give better results than'others, and

some of which,besides acting to quicken the 'Sulscmnc rnp,

give satisfactory results when, used in the treatment of the fabric.- These substances .are preferably a plied to the fabric in solution, the liquid eing subsequentlyremoved y evaporation. l solved in either carbon 'bisulfid, turpentine or carbontetrachlorid and lid maybe dissolved in an acetone solution. Other substances which have been found of advantage in treating the fabric or-fiber to secure a better union of sodium polysulfid dissolved and a self-curing the treatment ofthe fabric or fiber and may be applied thereto byelectrolysis or by precipitation, er an oxid of cop er may be recipitated in" the fabric or her. Bene- Ecial results have also been obtained by mermost cases the result of a were applied he sulfur maybe dis-.-

the thiocarbani the rubber are in water, a so lutionof lead resinate,a'solution of palmoil, potassium stearate dissolved in 'alcohoL' cement formed by blending rubber, litharge and-sulfur in-gasolene. 1 Copper or metallic lead may also be used in fiber, thus increasing the adhesionof the latter to rubmay, however, be produced ysuita the removal of'the fuzz being of itself be'neand rubber into intimate r v in powdered form may also be use cerizing the fabric, or by treating it with an. and rubber into intimaterelafion with" each alkali. An application of; soot to the fabric other, which consists intreating the fabric will also give eneficial results. .While the with an a lication of a metal applying-run soot may be obtained from an source it yulcaniz rubber to the fabriqand finally 4o bly vulcaniz'ng the rubber;

. burning the fuzz appearing on the fabric, 2. The process of unitinegl'fabric or ifiher ficial in-securin'g a better- 'on of the rubother which consists in treating theiab'ric ation with each I a bar and 'abric. Calcium oxid orhgdr ti zgids with an a plication of co'pgper applying unyulcanize ,rubber tothe' can be applied inan suitable manner as for 'vulcanizing the rubber. v instance by means 0 ablast. It is also pos- 3. The process of uniting fabricor-fibrous sible to apply the, sulfur, copper and other material and a rubber com ound containing of the mentioned'substances ma ry, finely a vulcanizing medium w ich consists in-BO abrlc, and finally 115' diyidedv state bl means of a blast, friction or treating the .fabric with a non-vulcanizing otherwise. -I ave also obtainedv beneficial medium which will be-non-detachablyasse results by usin -various of the above treatciatedwith thefabric and which has greaterments "in com ination. For instance, theadhesion for rubber than thefabric, ap lyfabric. or. fiber may first-be treated to asoluin unvulcamzed sulfur-containing ru ber' 5 I tion-of an alkali,fand after bein dried may to the fabric so-treated'and finally vulcanbe dipped in a solution of sul r or thioizing the rubber. V carbamlid, after which it is finally dried. 4. As an article oflma'nufacture the. ($9111- In an ap lication filed" by me 0 even date bination of fibrous material,"a'unit in new herewith, berial :No 634,969, I haved1syulcanizing'age tim'pregnated inthc "se s I 25 closed thexi'dea of causing hmore intimate material and having a r 1' adhesion' for'.

i invention either in oon'unction with any of In testimon whereof, II have ..initia1 relation mechamcally between the rubber than has the bro material,- and fabric or fiber and the 'rubber'prior to will sulfur-containing rubber mflcanized ininticanization, and-'1 wish it to'be understood mate association with the fibrous material that I contemplate em loying the present. and agent. a

the processes describe in said c'ompamon my hand in te presence oi'two subscribing ap lication or alone. witnesses.

I narmonnnrmcs.

Iaving thus described invention, what I claim as new and desire to secure by LettersPatentis: C. J. Dtmrn a v A -"1. The process" f fabric or fiber C. P. Tonsox. 

